IDEAS home Printed from https://ideas.repec.org/a/eee/empfin/v17y2010i4p803-817.html
   My bibliography  Save this article

Improving the statistical power of financial event studies: The inverse variance weighted average-based test

Author

Listed:
  • da Graça, Tarcisio B.

Abstract

Some claim that the event study methodology literature is "mature". But the overlooked IVWA-based test is more powerful than conventional tests. Its implementation requires the same inputs as the traditional test. Its functional form yields the power improvement. Using CRSP monthly data for 1944-1971 and 1980-2006, simulations indicate that IVWA-based test correctly rejects the null hypothesis substantially more frequently than the traditional test. Its superiority seems more pronounced over 1980-2006. This casts doubts over previous event studies that failed to reject the null. They may have done so incorrectly due to lack of statistical power. Their reevaluation under IVWA-based test is advisable.

Suggested Citation

  • da Graça, Tarcisio B., 2010. "Improving the statistical power of financial event studies: The inverse variance weighted average-based test," Journal of Empirical Finance, Elsevier, vol. 17(4), pages 803-817, September.
    • Handle: RePEc:eee:empfin:v:17:y:2010:i:4:p:803-817
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0927-5398(10)00029-0
    Download Restriction: Full text for ScienceDirect subscribers only
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Patell, Jm, 1976. "Corporate Forecasts Of Earnings Per Share And Stock-Price Behavior - Empirical Tests," Journal of Accounting Research, Wiley Blackwell, vol. 14(2), pages 246-276.
    2. Malatesta, Paul H., 1986. "Measuring Abnormal Performance: The Event Parameter Approach Using Joint Generalized Least Squares," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 21(1), pages 27-38, March.
    3. McDonald, Bill, 1987. "Event Studies and Systems Methods: Some Additional Evidence," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 22(4), pages 495-504, December.
    4. Chandra, Ramesh & Balachandran, Bala V, 1992. "More Powerful Portfolio Approaches to Regressing Abnormal Returns on Firm-Specific Variables for Cross-Sectional Studies," Journal of Finance, American Finance Association, vol. 47(5), pages 2055-2070, December.
    5. Thompson, Rex, 1985. "Conditioning the Return-Generating Process on Firm-Specific Events: A Discussion of Event Study Methods," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 20(2), pages 151-168, June.
    6. A. Craig MacKinlay, 1997. "Event Studies in Economics and Finance," Journal of Economic Literature, American Economic Association, vol. 35(1), pages 13-39, March.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Yadav, Pradeep K., 1992. "Event studies based on volatility of returns and trading volume: A review," The British Accounting Review, Elsevier, vol. 24(2), pages 157-184.
    2. K. Chau & S. Wong & C. Yiu & Maurice Tse & Frederik Pretorius, 2010. "Do Unexpected Land Auction Outcomes Bring New Information to the Real Estate Market?," The Journal of Real Estate Finance and Economics, Springer, vol. 40(4), pages 480-496, May.
    3. Ana Paula Serra, 2002. "Event Study Tests: A brief survey," FEP Working Papers 117, Universidade do Porto, Faculdade de Economia do Porto.
    4. Hyun Joung Jin & Jang-Chul Kim, 2018. "Effects of the “Gangnam Style Syndrome” on the South Korean stock market," Journal of Cultural Economics, Springer;The Association for Cultural Economics International, vol. 42(1), pages 139-161, February.
    5. Chia-Lin Chang & Shu-Han Hsu & Michael McAleer, 2018. "An Event Study Analysis of Political Events, Disasters, and Accidents for Chinese Tourists to Taiwan," Sustainability, MDPI, vol. 10(11), pages 1-77, November.
    6. J. David Cummins & Christopher M. Lewis, 2002. "Catastrophic Events, Parameter Uncertainty and the Breakdown of Implicit Long-term Contracting in the Insurance Market: The Case of Terrorism Insurance," Center for Financial Institutions Working Papers 02-40, Wharton School Center for Financial Institutions, University of Pennsylvania.
    7. Ma, Richie Ruchuan & Xiong, Tao & Bao, Yukun, 2021. "The Russia-Saudi Arabia oil price war during the COVID-19 pandemic," Energy Economics, Elsevier, vol. 102(C).
    8. Gokhale, Jayendra & Brooks, Raymond M. & Tremblay, Victor J., 2014. "The effect on stockholder wealth of product recalls and government action: The case of Toyota's accelerator pedal recall," The Quarterly Review of Economics and Finance, Elsevier, vol. 54(4), pages 521-528.
    9. Sebastien Bradley & Estelle Dauchy & Makoto Hasegawa, 2018. "Investor valuations of Japan’s adoption of a territorial tax regime: quantifying the direct and competitive effects of international tax reform," International Tax and Public Finance, Springer;International Institute of Public Finance, vol. 25(3), pages 581-630, June.
    10. Daniel Celeny & Loic Mar'echal & Evgueni Rousselot & Alain Mermoud & Mathias Humbert, 2024. "Prioritizing Investments in Cybersecurity: Empirical Evidence from an Event Study on the Determinants of Cyberattack Costs," Papers 2402.04773, arXiv.org.
    11. Chang, C-L. & Hsu, S.-H. & McAleer, M.J., 2018. "An Event Study of Chinese Tourists to Taiwan," Econometric Institute Research Papers 2018-003/III, Erasmus University Rotterdam, Erasmus School of Economics (ESE), Econometric Institute.
    12. Arora, Seema, 2000. "Green and Competitive? Evidence from the Stock Market," Research Papers 1650, Stanford University, Graduate School of Business.
    13. Andrieș, Alin Marius & Ongena, Steven & Sprincean, Nicu, 2021. "The COVID-19 Pandemic and Sovereign Bond Risk," The North American Journal of Economics and Finance, Elsevier, vol. 58(C).
    14. Karan Girotra & Christian Terwiesch & Karl T. Ulrich, 2007. "Valuing R& D Projects in a Portfolio: Evidence from the Pharmaceutical Industry," Management Science, INFORMS, vol. 53(9), pages 1452-1466, September.
    15. Min Shi & Wei Yu, 2018. "Market Reactions to Supply Chain Management Excellence," JRFM, MDPI, vol. 11(4), pages 1-10, October.
    16. Bryan Fong, 2021. "Analysing the behavioural finance impact of 'fake news' phenomena on financial markets: a representative agent model and empirical validation," Financial Innovation, Springer;Southwestern University of Finance and Economics, vol. 7(1), pages 1-30, December.
    17. Hyun Joung Jin & Jang-Chul Kim, 2008. "The effects of the BSE outbreak on the security values of US agribusiness and food processing firms," Applied Economics, Taylor & Francis Journals, vol. 40(3), pages 357-372.
    18. Christophe Godlewski & Zuzana Fungáčová & Laurent Weill, 2011. "Stock Market Reaction to Debt Financing Arrangements in Russia," Comparative Economic Studies, Palgrave Macmillan;Association for Comparative Economic Studies, vol. 53(4), pages 679-693, December.
    19. Ahmad H. Juma’h & Yazan Alnsour, 2018. "Using Social Media Analytics: The Effect of President Trump’s Tweets On Companies’ Performance," Journal of Accounting and Management Information Systems, Faculty of Accounting and Management Information Systems, The Bucharest University of Economic Studies, vol. 17(1), pages 100-121, March.
    20. Fisher-Vanden, Karen & Thorburn, Karin S., 2011. "Voluntary corporate environmental initiatives and shareholder wealth," Journal of Environmental Economics and Management, Elsevier, vol. 62(3), pages 430-445.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:empfin:v:17:y:2010:i:4:p:803-817. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.elsevier.com/locate/jempfin .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.